An antioxidant powerhouse, cocoa butter is high in antioxidants, which help fight off free-radical damage to the skin. Free radicals can cause skin aging, dark patches, and dull skin. The fat in cocoa butter forms a protective barrier over skin to hold in moisture. Cocoa butter is also rich in natural plant compounds called phytochemicals. These substances may improve blood flow to the skin and slow skin aging by protecting against damage from the sun's harmful UV rays.